title: New cycloartane triterpene glycosides from Beesia calthaefolia.
abstract: Two new cycloartane triterpene glycosides (compounds 1 and 4) were isolated from the whole plants of Beesia calthaefolia with two known glycosides (compounds 2 and 3). Compounds 1 and 4 were assigned as (20S(*),24R(*))-16β-acetoxy-20, 24-epoxy-9, 19-cyclolanostane-3β,12β,15α,18,25-pentaol-3-O-β-d-xylopyranoside and (20S(*),24 R(*))-16β-acetoxy-20,24-epoxy-9,19-cyclolanostane-3β,15α,18,25-tetraol-3-O-β-d-xylopyranoside, respectively. Their structures were elucidated on the basis of extensive spectroscopic data analyses and comparison with spectroscopic data reported. Compounds 1 and 4 showed potential inhibition activity for the proliferation of splenocytes.
authors.affiliation: a Department of Clinical Pharmacology , General Hospital of People's Liberation Army , Beijing , 100853 , China.
authors.forename: Hong-Jie
authors.initials: HJ
authors.lastname: Li
authors.forename: Li-Hua
authors.initials: LH
authors.lastname: Mu
authors.forename: Xian-Zhe
authors.initials: XZ
authors.lastname: Dong
authors.forename: Xiao-Yue
authors.initials: XY
authors.lastname: Ge
authors.forename: Ping
authors.initials: P
authors.lastname: Liu
mesh_terms: D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D029626:Ranunculaceae / Q000737:chemistry*; D013237:Stereoisomerism; D014315:Triterpenes / Q000737:chemistry*
chemical_list: D006027:Glycosides; D014315:Triterpenes; C085352:cycloartane